用于研究分层系统动力学不稳定性的一种坐标系统
A Coordinate System for Dynamical Instabilities in Hierarchical Systems in REBOUND
AI总结：
本文提出了一种适用于研究宽双星系统的坐标系统，用于改进TRACE积分器在处理近身接触时的性能，实验表明其在多种场景下表现优于传统方法，且效率更高。
摘要：
我们实现了适用于研究宽双星系统的坐标系统，该系统适用于TRACE积分器，这是一种广泛使用的开源N体积分包REBOUND中的混合积分器。在传统混合积分器表现不佳的领域，该坐标系统支持系统中任意两体之间的近身接触。我们描述了该坐标的实现，并在REBOUND生态系统中与其他积分器进行了性能基准测试。在行星-行星散射、恒星飞越和ZLK振荡测试中，TRACE在宽双星坐标下的结果在其他混合方法失败时表现定性正确，并在许多情况下返回与高精度IAS15积分器统计相似的结果，速度提升可达9倍。我们还提供了一些使用这些坐标的指导方针。
英文摘要：
We implement coordinates suitable for studying wide binary systems in TRACE, a hybrid integrator in the widely used open-source N-body integration package REBOUND. This is a regime in which traditional hybrid integrators perform poorly. The coordinate system supports close encounters between any pair of bodies in the system. We describe the implementation of this coordinate system and benchmark its performance against other integrators in the REBOUND ecosystem. In tests of planet-planet scattering, stellar flybys, and ZLK oscillations. TRACE in wide binary coordinates is qualitatively correct when other hybrid methods fail, and in many cases returns statistically similar results to the high-precision IAS15 integrator with up to 9x speedups. We also provide some guidelines for when use of these coordinates are appropriate.
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